Pontiac 1996 Grand Am Owner's Manual page 248

Surge Tank Pressure Cap
NOTICE:
~~ ~
Your pressure cap is an 15 psi l(105 kPa)
pressure-type cap and must be tightly installed to
prevent coolant loss and possible engine damage
from overheating,
When you replace your surge tank pressure cap,
a GM
cap is recommended.
Thermostat
Engine coolant temperature is controlled by a thermostat
in the engine coolant system, The thermostat stops the
flow
of coolant through the radiator until the coolant
reaches a preset temperature.
When you replace your thermostat, an AC@ thermostat
is recommended.
Power Steering Fluid
When to Check Power Steering Fluid
It is not necessary to regularly check power steering
fluid unless you suspect there is a leak in the system or
you hear an unusual noise. A fluid loss in this system
could indicate a problem. Have the system inspected and
repaired.
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